Micro-emotion or micro - emotions as small emotion, compare with the big emotions: Love, hate, courage, fear, joy, sadness, surprise, pleasure and disgust etc, and according David Huron’s theory which is a domain of feelings are more subtle and much less obvious. The Micro-emotion can be divided into two types, negative micro – emotion, and positive micro – emotion.
The negative micro-emotion like a sort of annoyances, according Randolph Nesses descript those rare individuals who are born without pain such as appendicitis. Instead, they suffer the consequences of serious circulation problems, arising because they do not frequently change posture.
Negative micro- emotions are evident in the following everyday annoyances:

changing posture because of discomfort

visual glare, visual obstruction

itch (ask deep-sea divers who wear head-gear)

nasal congestion

temperature, discomfort due to coolness, heat, humidity

mild thirst & hunger

call of nature

Positive Micro-Emotions-There are exist small pleasures:

watching people pass on the street

the smell of flowers; new laundry

viewing a distant vista

rolling over in bed

a sip of water

sitting down after standing for a while

warm water on your hands

closing your eyes when tired

putting on some music

The evidence proves micro-emotions have physiological concomitants, which is tachycardia versus bradycardic heart-rate responses. Tachycardia responses are indicative of mild annoyance while bradycardic responses are indicative of mild interest. These responses can occur many times per minute.